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R31537 Cobalt vs. N07716 Nickel

R31537 cobalt belongs to the cobalt alloys classification, while N07716 nickel belongs to the nickel alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R31537 cobalt and the bottom bar is N07716 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 14 to 23
34
Fatigue Strength, MPa 310 to 480
690
Poisson's Ratio 0.29
0.29
Reduction in Area, % 13 to 23
46
Shear Modulus, GPa 87
78
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
860
Tensile Strength: Yield (Proof), MPa 590 to 940
350

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1480
Melting Onset (Solidus), °C 1290
1430
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 13
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.5
Embodied Carbon, kg CO2/kg material 8.1
13
Embodied Energy, MJ/kg 110
190
Embodied Water, L/kg 530
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
240
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
300
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33 to 44
28
Strength to Weight: Bending, points 26 to 32
24
Thermal Diffusivity, mm2/s 3.4
2.8
Thermal Shock Resistance, points 24 to 32
24

Alloy Composition

Aluminum (Al), % 0
0 to 0.35
Carbon (C), % 0 to 0.14
0 to 0.030
Chromium (Cr), % 26 to 30
19 to 22
Cobalt (Co), % 58.9 to 69
0
Iron (Fe), % 0 to 0.75
0 to 11.3
Manganese (Mn), % 0 to 1.0
0 to 0.2
Molybdenum (Mo), % 5.0 to 7.0
7.0 to 9.5
Nickel (Ni), % 0 to 1.0
59 to 63
Niobium (Nb), % 0
2.8 to 4.0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
1.0 to 1.6